Preheat the oven to 350°F.
Grease a large casserole dish and set aside.
Cook the noodles in a large pot of salted water according to the directions on the package until just al dente. Drain and set aside.
4 ounces wide egg noodles
Whisk together cream soup and milk in a large bowl.
1 10.5-ounce can condensed cream soup or homemade cream soup , ½ cup milk
Add the noodles, peas, and drained tuna to the cream soup mixture.
2 5-ounce cans tuna in water (such as solid white albacore tuna), ½ cup frozen peas
Season with salt and pepper.
kosher salt and black peper
Transfer the tuna mixture into the prepared baking dish.
Add the cheese and chips on top.
½ cup cheddar cheese, 1 cup coarsely crushed potato chips
Bake for 20-25 minutes until the casserole is bubbly and the top is golden brown.